package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.mapper.EmployeeMapper;
import com.itheima.reggie.pojo.Dish;
import com.itheima.reggie.pojo.DishFlavor;
import com.itheima.reggie.pojo.Employee;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {//implements实现,extends继承,后面都是要加s

    @Autowired
    private DishFlavorService dishFlavorService;

    /**
     * 新增菜品，同时保存对应的口味数据
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        //1.保存菜品的基本信息到菜品表dish
        this.save(dishDto);

        //2.再保存口味 dish_flavor
        List<DishFlavor> flavors = dishDto.getFlavors();//.getFlavors();

        //2.1给每个菜品口味设置dishId(设置菜品与口味的关系)
        flavors.forEach(flavor -> flavor.setDishId(dishDto.getId()));
        //2.2批量保存菜品口味(保存菜品口味数据到菜品口味表dish_flavor)
        dishFlavorService.saveBatch(flavors);
    }


    /**
     * 根据id查询菜品信息和对应的口味信息
     */
    @Override
    public DishDto getByIdWithFlavor(Long id) {
        //查询菜品基本信息，从dish表查询
        Dish dish = this.getById(id);

        //查询当前菜品对应的口味信息，从dish_flavor表查询
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId, dish.getId());
        List<DishFlavor> dishFlavorList = dishFlavorService.list(queryWrapper);

        //将菜品与口味信息封装到Dto中
        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish, dishDto);
        dishDto.setFlavors(dishFlavorList);

        return dishDto;
    }


    @Transactional
    @Override
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this.updateById(dishDto);

        //清理当前菜品对应口味数据---dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId, dishDto.getId());
        dishFlavorService.remove(queryWrapper);

        //添加当前提交过来的口味数据---dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors.forEach(flavor -> flavor.setDishId(dishDto.getId()));
        dishFlavorService.saveBatch(flavors);
    }
}
